One time I got a contigo, and it got me drinking purified water for a week straight. It tasted so good, I felt better. I was urinating more often.
Then suddenly around the week mark. I felt violently ill, massive headaches. I don't feel like refilling the contigo, grab a can of coke instead. It tastes funny because I haven't had one in awhile.
Headache clears up immediately and I'm back to perfect health
Mfw, I have a caffine addiction.